Do we need any more Sherlock Holmes spoofs? Daniel Clarkson and Jefferson Turner, aka the child-friendly double act Dan and Jeff, have made a speciality of offering knockabout pop-cultural condensations. Here, after Potted Potter, Potted Pirates and Potted Panto, they vow to “solve” each of Holmes’s 60 cases - ie, give a brief summary of them - in 80 minutes. This gets pretty cluttered pretty fast and it’s hard to pretend there is much riding on their success or failure. Like most Holmes rips, it struggles to say much new about a much-parodied late-Victorian institution that was never blind to its own archness anyway.

The show’s pleasures, though, are in the old-school interplay between silly Dan (Holmes, Moriarty, co-writer with his brother Tom) and straightman…